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International research project leads to a breakthrough in terahertz spectroscopyAlthough terahertz spectroscopy has great potential, especially for environmental monitoring and security screening applications, it previously could not be used effectively to study nanocrystals or molecules at extremely low concentrations. An international team led by Professor Luca Razzari at the INRS Énergie Matériaux Télécommunications Research Centre has found a solution to this problem by increasing the technique's sensitivity using metallic nanostructures, as explained in an article published in Nano Letters in January 2015.http://phys.org/news341669601.html
PhysicsWed, 28 Jan 2015 12:13:28 ESTnews341669601Researchers find hidden details and objects in eighteenth century altarpieceA multidisciplinary research team studying two paintings by artist Hermenegildo Bustos in the side altar of the parish of Our Lady of the Immaculate Conception in Purisima del Rincon, Guanajuato, found three layers with a number of previously unknown modifications not visible to the naked eye.http://phys.org/news339662604.html
ChemistryMon, 05 Jan 2015 06:43:37 ESTnews339662604New test reveals purity of graphene: Terahertz waves used to spot contaminantsGraphene may be tough, but those who handle it had better be tender. The environment surrounding the atom-thick carbon material can influence its electronic performance, according to researchers at Rice and Osaka universities who have come up with a simple way to spot contaminants.http://phys.org/news327156804.html
NanotechnologyWed, 13 Aug 2014 13:53:39 ESTnews327156804Technologies for the optical characterization of materials at terahertz frequenciesThe noncontact measurement of material properties using light is used in a wide variety of applications, from airport security scanners to medical x-ray imaging and various analytical techniques. Some of the most interesting information is contained in what is known as the terahertz region of the frequency spectrum, but developing broadband spectroscopic techniques for the terahertz regime has proved difficult. Masatsugu Yamashita, Chiko Otani and colleagues from the RIKEN Center for Advanced Photonics and Canon Inc. have now developed a spectroscopy system that operates across an unprecedented range of terahertz and infrared frequencies.http://phys.org/news317027630.html
PhysicsFri, 18 Apr 2014 09:00:02 ESTnews317027630Fingerprint of dissolved glycine in the Terahertz range explainedChemists at the Ruhr-Universität Bochum (RUB) have, for the first time, completely analysed the fingerprint region of the Terahertz spectrum of a biologically relevant molecule in water, in this case, an amino acid. By combining spectroscopy and molecular-dynamics simulations, they rendered the motion of the most basic amino acid, glycine, visible in an aqueous solution. Their results have disproved the long-standing theory that frequencies in the Terahertz range provide no information regarding the amino acid's motion. The team led by Prof Dr Martina Havenith-Newen and Prof Dr Dominik Marx published their report in the Journal of the American Chemical Society (JACS).http://phys.org/news315218014.html
ChemistryFri, 28 Mar 2014 09:35:19 ESTnews315218014Terahertz Waves Are Effective Probes for IC Heat Barriers(PhysOrg.com) -- By modifying a commonly used commercial infrared spectrometer to allow operation at long-wave terahertz frequencies, researchers at the National Institute of Standards and Technology discovered an efficient new approach to measure key structural properties of nanoscale metal-oxide films used in high-speed integrated circuits. Their technique, described in a recent paper,* could become an important quality-control tool to help monitor semiconductor manufacturing processes and evaluate new insulating materials.http://phys.org/news160839248.html
PhysicsWed, 06 May 2009 14:35:33 ESTnews160839248